To configure broadband to your college network, you will need to get some details from either your college network admin and/or your fellow students that already have it figured out.
That said, once you get the details, you can configure Knoppix as follows:
Click on K Menu>KNOPPIX>Network/Internet and from there maybe Network card.
If your college assigned a username and password to use when you connect to your broadband Internet connection, then you must set up PPPoE before you can connect to the Internet. Click K Menu>KNOPPIX>Network/Internet>ADSL/PPPOE configuration. It will attempt to detect PPPoE use on your network, and then enter you username and password to connect to your college Intranet (i.e. your ISP).
Once you finish the configuration application, you will be connected to the Internet.
Wireless is another matter - start another thread on that when you are able to solve this problem first.
Apparently, the book "Knoppix Hacks" cannot be searched at Amazon for the relevant chapter, but will be available in a new edition Nov 15, 2007 for $23.09 which you can preorder now, or the previous edition is available for $19.77 which also has some details on what you need to know.